default value of LogLevel is 1, so you can change it 0 (Zero) and restart the SMS Agent service to enable verbose logging. (You’ll need to change Administrators permissions to Full on @GLOBAL before changing this value)

Client-side debug logging

If you need more detail you can also enable debug level logging by creating a new key named DebugLogging and a value named Enabled REG_SZ (String) = True under the